The Air Stream is a big-volume sleeping mattress pump, based on Sea to Summit 20 litre Ultra-Sil Nano dry sack, with added valve plug and foot loop.
The Venturi effect that is featured allows the Air Stream to be inflated with a single breath. It only takes 2 to 3 cycles from the Air Stream to fill a Sea to Summit sleeping mat. It means that you are ready to go quickly, with little breath condensation in your mat, or dizziness from blowing the mat up. The Air Stream can also been used as a 20L dry sack, or as an ultralight pack liner.